subfigure latex
usepackage{caption}
usepackage{subcaption}
begin{document}
begin{figure}
begin{subfigure}{.5textwidth}
centering
% include first image
includegraphics[width=.8linewidth]{log_demo1.png}
caption{Put your sub-caption here}
label{fig:sub-first}
end{subfigure}
begin{subfigure}{.5textwidth}
centering
% include second image
includegraphics[width=.8linewidth]{log_demo2.png}
caption{Put your sub-caption here}
label{fig:sub-second}
end{subfigure}
newline
begin{subfigure}{.5textwidth}
centering
% include third image
includegraphics[width=.8linewidth]{log_demo1.png}
caption{Put your sub-caption here}
label{fig:sub-third}
end{subfigure}
begin{subfigure}{.5textwidth}
centering
% include fourth image
includegraphics[width=.8linewidth]{log_demo2.png}
caption{Put your sub-caption here}
label{fig:sub-fourth}
end{subfigure}
caption{Put your caption here}
label{fig:fig}
end{figure}